airoha: fix scuclk node for an7581

Add missing syscon compatible for scuclk node.
Fix the unit-address of the scuclk node.
This fixes the pcs driver error:

airoha-pcs 1fa08000.pcs: probe with driver airoha-pcs failed with error -22
airoha-pcs 1fa09000.pcs: probe with driver airoha-pcs failed with error -22

Fixes: c3d70b1 ("airoha: en7581: Add support for external PHY")
Signed-off-by: Aleksander Jan Bajkowski <[email protected]>
Signed-off-by: Chukun Pan <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/20190
Signed-off-by: Christian Marangi <[email protected]>

target/linux/airoha/dts/an7581.dtsi

@@ -490,8 +490,8 @@
 			reg = <0x0 0x1fbe3400 0x0 0xff>;
 		};
 
-		scuclk: clock-controller@1fa20000 {
-			compatible = "airoha,en7581-scu";
+		scuclk: clock-controller@1fb00000 {
+			compatible = "airoha,en7581-scu", "syscon";
 			reg = <0x0 0x1fb00000 0x0 0x970>;
 			#clock-cells = <1>;
 			#reset-cells = <1>;